Drilling apparatus.



G. H. GILMAN. PRILUNG APPARATUS. APPucATloN FILED 1uLY22.1914.

Patented. Mar. i4, 1916.

u, Wm u ,ma e. Ud` ng ,Ir o e @y .0

G. H. GILMAN.

DRLLiNG APPARATUS.

APPLlcAloN man 1uLY22.1914.

. Patented Mar. 14,1916.

5 SHEETS-SHEET 2.

Inventor.' George@ Gilman/L,

,/tys.

Witz/Messes G. H. GiLNlAN.

DRILUNG APPARATUS. APPLICATION HLED 1uLY22. 10ml 1, 175,745. Patented Mar. 14,1916.

5 SHEETS-SHEET 4.

y 6a? w 6a gw@ A 67 33 Winessels': Inventor.'

v (eor eli Gili/aai@ #7a/. g by my Aiwa/M fw l sini-ns PATENT omer:

yin. GIIQMAN, 'or ommeneier;A NEW HAMPSHIRE; AssrGNon To SULLIVAN MACHINERY COMPANY, .or nosfroN, Massacnosnrrs, A oonronA'rIoN or Mas.

, 'citizen of the Unit of Claremont, coun 4ofFNew Hampshire, haveinvented an Inii sncnusnfrzrs.

Specification of Letters Patent.

DRILLING APPARATUS.

Patented Mar. 14,1916.

applicati@ and July 22, 1914. serial Nn. 852,497.

To` all whom it may concern Y Be it known'that I, GEORGE H. GILMAN, States, and a resident of Sullivan, and AState proyfggnent'in Drilling Apparatus, of which the ellowing description, in connection with v" the accompanying drawings,`is a specificatin, like characters o n the drawings representing like parts. "This invention .relates toipressure fluid lrno`tors, and feeding devices therefor, and` to their control, and is more especially, though notex'clusively, concerned with a pressure -work,.means for ejecting the.` cuttings from `fluidzimpact or percussive drilling toolhaving 'pressure fluid feeding means for advancing the tool toward or retracting it "from 'its andacleansing the drilled hole, and means .for condilnately controlling `the tool, its feeding means, and the hol'eclearing means. i

Mv invention will be best understood 'by reference tofthe Afollowing specification, when taken in-connection with the accompanyingdrawings ofi one specific embodif ment thereof, while its scope will bexmore vparticularly pointed out `in. the appended' 1 n claims.

Inthe drawings: Figure 1 isa side elevation of a drilling apparatus of the general typelnofwn as a stoping drill, a portion of the feed means and the drill-bit being broken away; Fig. 2 is a sectional view en line 2%2 of Fig1;Fig. 3 1s a detail longitudinal sectional view,lalso on line 2-2 ofV Fig. 1, `but on 4an enlarged scale, showing the cylinder with vits head block and adjacent parts; Fig. 4 is a detail elevation of the valve on al much enlarged scale; Fig. 5a

isla detail elevation ofthe valve, also onan enlarged` scale, as viewed from the righthand side of Figt; Fig. 6 isa detailelevation ofthe valve, also on an enlarged scale, as viewed from the right-hand side of'Fig.

5,; that is', the oppositeside to that shown inwF ig. 4.; Fig, 7 uis a` detail elevation of the valve, also upon an enlarged scale, as viewed from theright-hand side of Fig. 6, that is,'tlie` side 'o'pposite to that shown in Fig. 5 Fig. 8 isa plan section on line 8-8r of Fig. 4;; Fig. 9 is awplan'sectionon line 97-9 of 5'; Fig."1Ois a plan` section on y f line 10-10 of Fig. G; Fig. 11 is a plan sec-l 1 tion on line ll-ll'of Fig. 7; Figs. 12 Vto y 2J, inclusive, are groups of detail sectional views illustrating the throttle valve in `various positions of adjustment, eachv group .comprising six views, namely: rnb, c, l, e, f, inclosed by a bracket. In each group, the view a is a sectional view corresponding to Fig.' 8, on lline S'8 of Fig. 4; the view b is a sectional view corresponding to Fig. 9, .on lint 947-9 of Fig. 5; the View c is a sectional view-on line c-c of Fig. the view d is a sectional view corresponding to Fig. 10 `on line 10-10 of Fig. G; the view c is a scctional view corresponding to Fig. 11 on line 11-'-11 of Fig. 7 and the view f is a sectional view corresponding in a general way to the axial section of the valve' in Fig. 3, though in some instances, the plane` of the section is varied, as shown by the ysection lines f-f in each igure.

Referring to'the drawings, and to the ein` bcdiment of my invention which I have selected for illustration, I'have there shown a drilling apparatus comprising a drillingI tool 21, having a cylinder 22, within whichv ing a hammer bar extension adapted to def liver a rapid succession of blows upon the inner end of a drill-bit 25, held in a chuck 26 in kany usual or desired manner.

The drilling tool may be either the valveless or the valved type, but the latter is pref ferred, and is herein provided with apressure fluid distributing valve 2T, working in Aa valve casing 28, the latter having a pressure supply space 29, from which the pressure fluid under the control of the valve is delivered to opposite ends of the cylinder, and is exhausted therefrom in any appropriate manner, which it will be unnecessary herein to describe, since it forms no` essential part of my present invention. The cylinder is herein provided with a'rear cylinder head in the form of a head blcck 30, having one or more, herein two, pressure fluid supplv ypassages 31 and 32, leading through the`l valve block to and through the cvlinder cas .ingto the constant pressure spaCEQLithe.

distributing valve casing.

. A fluid lsupply tube 33, passing throughV i an axial perforation 34 in the piston and its hammer bar extension, terminates at its forif?? L .ing4 der ice,H

L, 7:1. .AVA Ward end in an ama per ye form of 5 hole, orboth. i' In the present instance, the there 11 i e rlrill- 7e fluid supply tube is supportedatA jitsreiir5" btandkt 1e supply of p r'e'iuidto the iendfin tl 1eial veYblock SQk inv any suitable front endl o'f the cylinder andthe drill-bit manner,I which it is'` unnecessaryherein to f' Vehuekg-,toqpreigent the entrance of weten and describe, and receives gaseousffluidsueh*for lsludge, will appear more fully herbil'fexample as airunder pressure, through a after'. 75 passage 3 6, a'nd'water' through a passage 38, .The throttle valve is herein provided with v both'of which will be referredto'niore `fully an axial eha'mber' '51,'- 'reeeiyingffa-isupplyjof vhereinafter. The passage 37 may be plaeed pressure fluid from,afpressurejfluid iiiiletQ, `in communicationk at will with a Waterjsup- ``,tofwhiell"isoenneeteda` pressiirfear1; v'd up- 15 plypasage 38 leading from a watersupply 1 ply conduit 5311 Thel'valye is' 8e "chamber `39, the latter ycommunicating with `vided with ajshouldere f i' a/ii'vater 'supply conduit 40,'fwhereby waterI T upon aise'at (against f naybesuppliedto'thepassage 37-fa`nd conajzsiiitable sprin'gfid ducted-therefrom bya nozzle 4l toa oharnlower)- end 'of tlieva 20'l oer,4 2,j` therec'miningled 'With 'the air ,or turning the'valyef'thelattei otherpres'snrefluidfronr he passage 36,' and Avidedwith Aa stem tei; l V, "delivered through the fluid"supplyftubef la handle 58, andiff'desire l Y to the hollow drill-bit Thepassages36,',` bejheld in, the" si'e'l'e'eter` o' 37'and 38;"are, as a matter of fact, in front ment detentispring- 25.. 'ofthe plane of thesection, Fig. '3 (seedig. valyeinaybe oth `wise si'iitabl .fe l), but for'the sake'of'clearness of illustra` por-ts. andfpassa )'rtl control oiithgi ,-tion,f,the`se 'passages are lshown ,in broken` ean's, t'liefsupplyfnf pres lnesinFigI v "ill-ldi'tfthesupplyifqwa- The drilling tool may be fed bylpressure s1nd 'the-supply Qfup `es- 7 goil-Huid feeding''rne'ans, herein aeomp'rising aV sure fluidfto th'eI tfrrnteld` 'offth, nl 1 feed cylinder 'member 43, and a feed piston' and the" ljrll Chuck, but lrp'refereto,

ai fmeansa ifo `fg `inernberg44, 'either of Iwhich .may be conjthe'arra gementofportsand i nec'tedyto' the drilltool, but herein the piston will 'noyy describ` e; 1*'

"linernber isgpr'ovided with apiston r`od45, The .eircuinfr "tial siifrfa-ee o ggj'secured te the head block 30, and y,thus to the `is herinprfovidfe'd I A vitla -groove'lgwhieh 1* A'cylinder lof 4the drillingtool .The feeding in the,ieroforfintifaly,positionbofithermbfr devie'e'rnay be', and preferably. is, double-` 'establishes'eininunicationbtweenyth va'cti'n'g,thatis `to sayg'fit has-.,capaeity for 'Ward feed passage 4'6i'anditlreifexhaa1 advancing" thev drilling tool` toward or: re orjvent 6l leading to the atmosphere K 4G 'pl'tngit from its .worln-andtothat end,' Eig; 12,* parti 1 y "ary-ewsjwand-fl thepiston'rod is herein yprovided ,with apascircumferential urfaee 'f5 ,e valve d sage 46V terminating at. ..-the =rear side 'of the provided with a g1 oiie 62gf-whiehii theauzero piston 44, and a passage 47 terrn'inatin g at its or `initial pos'tiongof,,the"fralveaestablfishes other side; "Assuming tha-tthefeed cylinder crmnunieatirr"between.thei euersekw ear- 45143 is held fixed when pressure fl-uid is sup- Wardfeed"passage 47 and y I "plied to the'passage 461 andwithheld from j port orjv ,ent;"63, leading- 'zthe passage 47, 'thedrillingtoolis advanced (see .Fig.`12f`,f p'a'r'tie'ularl teward' its Work, While'on` the other' hand, if Thus when elle` 'valveli pressure fluid be supplied'togthejpassage 47, i position', L?eo minu'ni"`cfatiorriiks.` established be- 50 and Withheld' from `thepassagef46, the tool [tweenbotheids'of the feed'eyliander and the 'will be retractedg The feed :cylinder 43 may y.atmosphere;whereby"thefeed :piston aya vje beheld fixed in anyappropriate iinanner, adjusted'jmanu'ally Witlheutraresand if desired'inay be provided ivitha spur certain, tinies\in`f=theloperatiorido 48,;,to befplaoed against a suitable abutment chine, the\'eonnnunicationf''of the ,forward 551 o n vthe Vfloor or Wallof the mine, butthe tool feed, passage 46'f`wi'th the, atrnosf ispartieularly intended `and,`adaptedto bei Wayoftheffgroveiselo'sedand mgaurnQunt-edupon'apost oreoluinn, and to' that" nieationlis"stablishedgbetween`fsaidp end',"is` provid`ed` withar'lniounting compris` Aandl the lpressure'fluid supply A a swivel'mernber '49 forined` in the usual feed'ftlietojol frward. ifAtifz'celitainfftiines in s. 'rn'annerfor'supportuponasaddle, and is thelgop'er'ationofthe-:'rnachine,theeomrnuni- ,I` seeured'to the feed cylinder in jany appr'ecation" between 'the reversekfor4v ,rearward prate 'ma-nner, lwhich it will be 4urineoessary feedff'pa'ssage:anditheztmospher by Way herein to describe-aas it forms the subject`.1ofthe1 grooie, (isf-elsed, arrdxe'ommunicamatter of a separate application. ytion is' established b'e'tleelsaid passage'and I e5 Preferably mounted. in the head' bloelrli() the pressure flu-id 'supply,'-therebytp;cause tthtortte fearless; An of this win. lmore fully `alppear hereinafter.

1pto theireaifendi 'of the `feed cylinder is supplied-with pressure'luidto advance the` tool ,by lportfi extendingentirelyithrough the circumferential wall of? thevalve, andremmunicating withitsfinterior pressure fluid supply chamberl; This portis herein provided with a 1laterallyextending circumfer- Jfsuppliedfwhen the portl 64 itself registers t `with `thepassage416,k The port `64E 1s also utilized `at a` certaintimelintlfe operation of ablish communication between the pressure fluid supply and the passage 1,31, p During 31 is placedin communication with the presj surefl'uid supply Vby a1 portf 6.6, extending enirely throughgthe `('.ircumferential wall of hejvalve` into "communication `with its inte- ,rpressure fluid supply chamber 51. It will `be remembered that the passage. 31 Aleads ,totthe distributinggvalve lchamber of the l1 ill tool.- The `passage A32,'whichalso leads ool,"`is" alsofplacedjin ,communication with `the"fpr'essm'e `fluid supply by a port,` 67, eX-

w'all of the valve, and communicating with 51",` NVhen` the i pressure 1fluid `is `to be sup. `plied tothe cylinder to cause ,the tool to be retracted, the port: 66` at such time is utiized v to establish "communication between the pressureifluid supplycand` the creverse orrearward"feeddlfpassage 4t7. As a means` fluidrtobe delivered `to[thedrilling tool to ruri `-thesame slowlyQjmd` f spot thev hole,i fthe Aport 66` isherein provided with a circumferential-groove 6`8,gwhich is adapted to regn A4isterwiththe passage 31 `leading to the tool advance` of fthe main portion of'tl i u e. e e, I, will novvdescribe the ports `in the valve `Iwhereby{pressureQluid isisupplied to the fluyidgsupplytube atv certain periods in pose, the l'valvje is herein provided with tivo ports `69yand`` 70, leading; from `the internal cumferential` wall. 5g IjEither y of, these ports may bey broughtinto register with the hereinbefore,describedlpassage- 36, leading to thfchalnberhfl, "andthe `lluidsupply tube 3,3y ,In ordertovmaintainf communication between u cachant-,these `ports andthe passage` fdnring` aiconsiderable part (of `the turning movement` `of `the valve;` the latter is herein:` provided i with two" circumferential grooves 71 l and 972, communicating respec-` images Y, f The 5 fomvardfeedilfpassage 46 leading i,

A'ential groove 65,*wherebyf at certain posi tions of` thevalve,"a"snaller quantity of air` may begsupplied tothe feed cylinder than 1s he `I nachine,as'hereinafterdescribed, to es-` he norma-loperation of the tool, the passage i,the11distribuiting'` valve `chamber of the i tending entirelythrough `the circumferential ts nterior i pressure fluid lsupplychamber .forl ca'usm g 4a9 `very "small supplyof pressure' p theoperatioirof" the machine." For this pur@ chamber `51 `ofthe valvekthrough its ciri tively'with )and forming in effect `parts of the passage 36, and thus causes pressure fluidlto be supplied to the drill-bit, while .in positions Nos. 7 and 8, shown in Figs. 19

. and 20, respectively, the groove 72de in regt lster with the passage 36, and thus causes pressureliuid to be supplied therethrough to the drill-bit. 1

I will now describe the grooves in the f v alve, whereby water is supplied to the fluid supply tube 33 at certain periods in theope'ration of the machine. For this purpose, the valve 1s herein provided with two grooves 73 and 74, each having` a generally U-shaped form. The groove 73 is provided with` an upper eircumferentialiportion 75, adapted at certain timessin-"the operation of the machine to register with the upper passage 37. The groove 73 is also provided with a lower circumferential portion 76 adapted at such times to register lwith the lower water `supply passage 38. Similarly, the groove 74 `is provided with anupper circumferential portion 77, Vwhich at certain times inl the operation of the machine is adapted to register' Awith the upper port 36 andis also provided with a lower circum ferential portion 78, which at such times is adapted to register 'withfthe lower Water supply passage 38. When thevalveis in the position shown in Figs.v 15, 16,717 and 73 maintains communication 18, the groove between the water supply and the water passage 37 leading to the fluid supply tube 33. When, however, the valve is in the position shown in Figs.- 19 and 20, the groove 74 maintains communication between the water passage 37 vleading' to the hereinbefore described may be provided with one or more, herein a plurality of rife grooves 81. utilized for the actuatiomeof a chuck rotating mechanism 82. the latter being preferably `the same or `similar to" that `which forms the subject matter of .United moves rearwardly to a certain point, thev rear ends of the grooves 81 enter into the i forward-end of the cylinder, and thus' es- 'f appreiatdth'at the entrance of 'Such Water tablisli communication between the latter chamber 83T Awithin the chucky 26, and i ie rear end of" `its 'chuck bushing 'St.v During the jn'orinal operation of the ma` The drill is then placedso Ithat whentheqo chi-ne, "s'iiflicient'v pressure fluid is conducted from. the 'cylinder vthrough ,the grooves "81 tothechamber 83 .to prevent the entrance of' water vor sludge, which might otherwise nd itsway through the chuck bushing, and

thus into the cylinder. It will be readily `and-fsludge would be apt to produce serious injury to the `drill tool.. lllhemhowever,v tlievpressure fluid for the actuation of the .cylinder is .excluded from the latter when "f'thef'pi'ston' is at rest, and -when thel drill-bitV is in; the drilled hole andwater vvouldibe'.`

apt to enter` thes'ch-uck bushing and cylinder, pressure f lui'd'inay thenbe supplied to the www in this position, the feed cylinder may be moved -fre'ely'fto and fro' withfrelation 'to they feed pist-on, so that the preliminary adjust-` Y. ment of. the machine mayy-,bei accomplished.

end ofv the drill-bit is against or adjacent' the work, the feeding device is contracted,.. that is to'say, the feed piston is'adj acentthe.- rear end of the :feed cylinder. Hav-ing prop-il ferly arranged the machine, asv will vbe readily.75

understood by those skilled in the' artythe"l m operatorl then ygrasps the handlev .5 8 gangli... tui-.ns the' same contra-clockwise from thinv initial or zero position shown in--Fig: 12,? toward the No. -l position yshown in Fig: 13.1. 80

The4 first event which takes place-is the .ad

mission of pressure vfluid t ing by *Way ofthe port .f85ffand pas`sage79,;

and the 'adm ission'of pressurefluidtothe,I

forward -end of the vcylinder by 'way of the passage 79 and port `80. j Such pressure fluid is automatically supplied at the proper time, l

underthey control of the .describedv throttle valve,A byl the use vof the ports inthe valve which I will novvdescribe.

"Extending through the circumferential wall ff `the valve isa port 85, and leading therefrom is` circumferential groove 86 forming in effect a circumferential continu# ation lthereof.f; When the valveis in the poend' of the feed cylinder, dueto.themove-5;.,`

:"sitioiii-illustratedl iiig- Figs. y13, y14, and 1 5, 511013911385 and its grooveSG maintain com? rni-nication--betwen the pressure fluid supply andthe passage 7 9, leading ,to thevport,

8O atthe front end ofthe cylinder. When Vtheyalve is in the position shown in Fig. 19,

communication -between the` `pressure vfluid supplyand the passagef') is established by a'port 87 extending through the circumferen tial` walll of the valve. It .sho-uldherebe observed tliatthe,communication,thus estab'il lisliedbetween'the pressure fluid supplyl and the ypOrt-SOat the forward end of ythe cylinderoccurs only at such times Vas the supply ofpressure tlui'dis cut off from the sup- Ispace29 of thedistribi'itlng valve 27.

controlling valve,/I will now describe the general operation of `the controlling appament y'of the groove 6 0- outof registenwvfith oo the atmospheric Vair vent or exhaust port 615-; Simultaneously tlierewithaa limitedygupply.; of'pressure fluid is vadmitted to the rearendi of'y the feed cylinder -by waylofJr the v.port 6 4, groove 65`,and passage46, thereby. :causing-qf 95 the't'ool to? be advanced slowly.` `Pressure.`

fluid is stillexcluded from rthemfront end ofzf the feed cylinder,A and ,the same vis' still jopen; to 'the atmosphere. *Pressure y.fluidi's still? supplied to 'the ychuck bnshingjand .toftherlOO ratus and the vari-ous eventswhich occur in.

turning. the valve toitsfseveral positions, reference being `had to Figs. 12 to 20,-in-

'which "the valve .occupies in the' use of. the n'iachi'ne.- The initial or neutral position of the .valve is shown yinl Fig. 12. .It willy be observed'thatinthi's positionAa/fthe \va1lve communication :between/both, ends of `the feed cylinder 4and* th/e atmosphere is]vv established by Way offthev exhaust ports oif, atmosl lphe-ri'c vents""61. and 6?. whilethe* supply of vino tive-fluid is. entirely. -ci'i'tf-oif l from kthe .clusi've,'f\ vshovvii'xgy the different positions fiuid `supply tube, as :in the.v position. fshown; in Fig.'13. f It will.y be understood-ithatcatffthis time, the supply of Wateris shutoff.

The next event which takes 'placeis the atl-1% mission of Water to the Huid vsupplv tube; 33, '.105 y by way ofthe passage?, groove.76.;groove,;

73, groove 75, and passage 37 (see,l* `ig.15);.v It'willbe understood thatinother rcspeicts, the-conditions prevailingjn vthexpositiony shown in Fig. 14 are still maintaine d,and 1110 it v:will be understood. that t thei4 drill-,bity isf; now firmly pressed against the .workfandat supply of commingled,.pressiirefiiiiid;.and' Water is delivered to the' cutting endof the drill-bit, while' water isf-prevented from 115 entering '.the chuck" bushing 'because` if-the fact that pressurefluidis s uppliedftofthev latter. y.The fourthevent whichtakes .place is the admission of a limited ysupply ofi-press;

- the port 66itsgrooves-6S `andthe passage'L therewith.'

sure fluid'to -thehamnier drill by'fwayf; :ofi 120 31, whereby `the hammer' iscaused to operate slowlyl toI spot -the hole. Simultaneously the pressure flu-id .g supplied through the passage 7.9and port 'SO'tothev 125 forward end fof the cvlinderfand to theI chuck` bushingis cutoff by.' t h e,moveinent.

passage A86 tela posi-` .'bit,"'and-'the'.oiiuck bushinrband fthe waterg'tion out-of register with the, passage- 17.5

supply' l iscutfof aswell. When the valvef'is (seaFigalflL In otherifespecias'I theconiA 13o mais attaining in. als passion Shown in l vl jare. still continued. The operator xiovv. continues to move the valve, first to the then totliefNo. 6 position illustrated inFig.

i the sameas in the No. 4 position, except that "thefsupply` ofipressurevfluidto.the cylinder `frz-f1the#inningi001 isms-hair of the iuii `capacityLInthe No. `GUposition, the condif tionsai'e the same as in the No. l and Noi'5 positions, jeiicept" that the ports leadingto i ithefcylindenof the drilling tool are now" `openedeto ltheirfullestextent, and the tool is infiilloperation. At such ti1nes,it is to benotedtliat both pressure fluid and Water are supplied to thewdrillsbit, thus `causing e .laying of the dust and the expulsionof e isfmaintained in this position until olehasbeenu drilled to kthe desired j ,whereupon the Avalve isturned clockv bv ai'eversal of the order of events Ine.` Continuing to turn the, valve c on Ward :the No. position shown. in ,4 fit will beobserved that the passage; ding tothe rear end of tlle feed; cylinb "der" isfnovv `placed in communication, with i nd filllressure Huid isnow su plied by Attheportr67 `and passage 47 see Figs. alidf) to the liront end of the feed ,thus `causing the `tool to be reholen i te``thejdrill-bit, because ot' the fact that` at lthislinefthegroove 74 registers with the Water lsupply passage 38.2J1d the passage 37,1`tlielatterleadingto the fluid supply tube.

` fbitdslfbeiiig `Withdrawn from the drilled .lioleytheylatter will beeleared of the cut.-

will be 'noted that theport 87 is in register are i excluded .w' continues to l d is new lul ing. pressure duid `to the ,andthe port Gel is rasage 31 n t position illustrated in Fig. 17, and a 1 l lille-cuttings from the* `drilled hole. The

its iinitial or neutral position. This ltofwltlie valve is of `course acconig `the machine'Y with all ports clsed,

sefrom its initial or neutral pos i' ftlie atmosphere, `by. 'Way of the groove 601- anjdetinospherio vent or port 61 (see Figs.-

L tfdf-.and Withdrawn from' the drilled )Atthesame time, a supply of gaseous fluid orgaseous fluid and `Water is delivered Thus itftwill"beapparentthat as the drill-V tliis moment, the supply of pres-` y Surletluidto ,the drilling tool uis out. oftbut with the Apassage 7 9 leading to the front end and (the eliuclr bushing,

leading te` v 1 l.. r2,- The'oombination of e' drilling tool .lievl pressure fluid to the ,feed (see Figs.A 141, 15,16, 17 and 18), is now utilized to deliver fluid to the drillinU' tool, while `on the other'hand,-the port 67, which Was heretofore employed to deliver pressure iluid to the drilli ig tool by way of the passage 32 (see -Figs.v 7=and 18), is now utilized to deliver pressure'. fluid to the feedreverse by Way of the passage 47 (see Figs." 19 and It will be noted that, in the No. 8 position of the valve, shown in Fig. 20, thel drillingtool is operated, and .pressure fluid supplied to the front end of the cylinder and chuck bushing, by Way ofthe passage 79 and port 80, is cut off by the movement of f' the port 87 from the position shown in Fig.

19 to that shown in Fig. 20. lVlien the drill- 'bit has been "Withdrawn `from the drilled hole, the operator turns the controlling `valve back to its initial or neutral position,

thus reversing the order of events, and leaving thetool as before with the pressure fluid shut off 4from all ports. Owing to the provision of the described means for conjointly controlling the drilling tool, its feeding device,"tlie supplies of gaseous fluid and water to the drill-bit, .and the .supply of pressure fluidi to `the frontend of the cylinder and place in their proper sequence, Without any attention ony the part of the operat r other: than to simply turn the handle conti` uously from one position to another according to the circumstances.

lfthe nature of the Worlrdoes not call for .Water, 'the supply may be discontinued entivi-ely by theuse of a shut oli valve 88, and the supply of pressure vfluid to the drill-bit continued as before.

While I have herein shown and described one specific embodiment `ot' my invention for illustrative purposes, and have disclosed `and discussed in detail the construction and arrangement incidental to one speciiic appli ,cation thereof, it iste be understood that the invention is limited neither tothe mere v details Aor relative Aarrangement of parts,

.nor 'to itsspeciiic embodiment herein shown, but that extensive deviations `from the 1llustrated` form of, embodiment of the invention may be, made, Without .departing from the principles thereof. l'

Having thus described my' invention, .what i claim and desire by Letters `Patent to procure is .-1

i. 'rae semanas@ @i a arming m01 ha?? ing, means for 4conducting Water'v to the drilled-holegmeans for feeding said drilling.

tool; and means for eoii'dinatfely A'controlling said drilling-tool, the Water to the drilled hole,andsaidieeding means.

ggrneans i'oliionductingpressure fluid and lwagrirto ,the drilledbole; means for feeding drilling teal; and means? fer .cordi- .VIN

`chuck bushing, the desired I,operations take flos izo

f .topreventrthefentrancerof water or sludge` pressurefliiicl and water to the drilled hole, u -sai1 d.fee d`ing means.

.The comb' ination of a drilling (tool have conducting water to Athe 0.a fee ngmeanstoadvance said .tool .toward the j orl, .the pr'essure fluid and water conng meansftoconductthe pressure fluid and wate to the;.work, and the drilling tool emithe order named.

ing nieans-:.for conducting water to the dholegmeansfm feeding. said drilling A meansto cause said drilling rtool 5 t oper e, .the feeding meansA to retract 'the hile itjis oper ating, and thev water .ng. me ans-to conduct water to the hile .the tool is being retracted. he ,combination of a drilling tool havingzmeansforconducting pressure fluid and wateiptogthe drilled hole; means for feeding l llingngtool and .means to I cause ysaid o l to` operate, the feeding. means ict the -toel while it is operating, and the pressure fluid and water conducting nel' 'In'eaiis-.toconduct pressurefluid and water lmi-'hile the. tool is vbeing retracted. ook-.drill Yhavinga cylinder, a piston "g therein, afchuck, .a hollow drill-bit averla 40 mounted in said chuck'and operatedbysaid, am pistongfffmeans :to conduct .Water to and thnoughfsaid drill-bit, .means Vto .conduct pressure ,fluid to l said.l cylinder for Vthe actupressure' fluidto be supplied tosaid chuck mounted in said chuck andoperatedb'ysmd pistone means` to conduct 'water to said fd'rillbit;and"i'n'eans to cause pressure fluid to be ff supplied tosaid chuckto prevent the en- "tr'aice-ofwfiter or sludge thereto whensaid Ipiston"isja`t Test. ,i l

I rock drill having a. cylinder, 'a piston firing-therein, meansl to conduct pressure {fluid-flosaidlcylinderfor the -actuationLof nately controlling said drilling tool,

'means' forffeeding said drilling ie combination iof a drilling tool hav tion thereofV gaseou bit, and means to cause a cessation of ther operation-of .said piston and to cause pressure fluid t-o be si'i'ppliedvto the front end of said cylinder and'said chuck to prevent "the entrance of water andvsludge thereto when Vthe piston is at rest. i

1o. A rock drumming a @yum-iena pis. ton working therein, means .tov conduct pressure fluid to said cylinder for the actuation of' said piston, means to cause said piston to reciprocate,"a chuck, ahollow drill=bt mountedin saidchuck and operated'loysaid pistoni` means to conduct wa'ter to' saiddr'illbit, and' means to cause thewithholding of actuating pressure fluid utilizedto reciprocate said pistoniand to'cause pressure' fluid to be supplied to the front end of saldi cylinder and said chuck to prevent the Aentrance `of water and sludge thereto when lthe piston .tool having means to conduct gaseous fluid having ports so arranged that Aone-position thereoffgaseousfluid is supplied*A tothe 'and Water to the work; pressure fluid means yfor feeding said tool; and'controlling means work, the supply of lwater is cuto, and the supply of pressurefluid tothe too'lfan'd feeding means is out off., i

l2. Tlie combination ofa pressure fluid tion thereof gaseous fluid is supplied to the' work,`l 'the supplyof water is cutoff,` the sup'- ply-,vofy pressuijefludto the tool is cut off, and pressure fluid i's suppliedto -the feeding means to .,cau se'the.tool to be advanced. .A i

13. The combination of a 'pressured fluid tool .having means to conduct gaseous fluid and Water to the workypressurefluid means for feeding said tool; and controlling means having ports so arranged that infoiieyposition thereof gaseous jfluid and vater .are supplied to they work, 'the supplyof pressure fluid to the tool is cut off. andA pressure fluid is supplied tothe f eedngnieausto cause the tool tobe advanced. 'i

14. The combination of a'. pressurefluid tool liaiv'ingnieans to conduct gaseousfluid i'io and .water to the worlrgpressurefluid 'means i for feeding said tool ;l and controlling 'means having` ports so arranged that ii'i-onepo'sition thereof gaseous fluid and water aije suppliedtp the work, and lpressure fluid is suppliedto the tool andto the feediugmeans to cause the tool;to lbe `operated and lVanced. v f f i f 15. The combination of a pressure'ffliiid :tool having means'` to conduct gaseous fluid and water to the work; pressurefluid mez'insf` for f eedingsaid tool; andcontrollingmeaus having ports soiarifanged that iii Ione'y posi"- "f awpressure' fluid.

ter to he jlvorll 3 pressure `-lluid means `feeding` said! tooll; and feontrolling means avingports` so arranged that ink one `posionff thereof gaseous lief u l y1,175,745

l having inea sflto` conduct gaseous fluid l supply gof pressure fluid to the `tool and feeding means is out off g and in another po stion gaseous fluid is supplied to the work, the supply of Water is out off, the supply of pressure Huid to the tool is out olf, andpres sure fluid is supplied to the feeding means toeause the tool to loe advanced; and nlan-l other position gaseous fluid and vater are supplied to the work, the supply of pressure fluid to the tool is out olf, and pressure 4fluid is supplied to thev feeding means to cause the tool to be advanced;v andlin another position gaseous lluid and Water are supplied the tool tobe operated and advanced. t l 21. The combination of a pressure fluid "Ito thework, andpressure fluid is supplied d to the tool and to the feeding means to cause toolhaving means to conduct gaseous fluid l ,and Water to the work; pressure Huid means l for feedingr said tool; and controlling means having `ports so arranged that in one positien .thereof gaseousfluid 1s supplied to the "work, thesupply of water is out o', and the supply of pressure fluid to the tool and feed ing means is out olf and nr another position gaseous fluid iis supplied to the `Work, the supply ofzwvater is out olf, the supply `of pressure fluid to the Atoollis out off, andpressure fluid is supplied tothe feeding `means to cause `the toolto be advanced; and in another position gaseous-fluid and Water are supplied to the Work,` the supplyofgpressurelluid to the tool is out olf, yand pressure fluid is supplied to the feeding means to cause the tool to be advanced; and in ani other positionl gaseous lluid andwater are supplied] to the werk, and pressure fluid' is supplied to the tool and to the feeding Vmeans tocausetlie'tool to ybe operatedand advanced," and in" another position gaseous fluid and Water are, supplied wto the` Work,L the supply 'ofpressurefluidtothe tool `is cut off, andf pres`sure"fluid is 'supplied to the 'feeding means to retract thetool.

Q2.,Theeoinbinato-n of a pressure fluid land Water LtoV tliefvvdrk; pressure lluid means l forv teedmgf sald tool and controlling means having ports so arranged that 1n oneposition ,thereofgasegous fluid-is supplied to the world of Wateris out olf, andztliesupressure'vfluifd' tofth'e too-l and feedzing" means is Leut offg' and: in another kposi- 11o f n tool 'having means .to eonduetgaseous fluid j supplied to the'Worlif'the supply of presoausethetool ,to be advanced; and iu another position lf lgaseous luld and water are supplied to the work, and pressure fluid is supplied to the tool and to the feed-ing means to cause the tool to be operated and advanced; and in another. position gaseous fluid and water are supplied to the work, the supply of pressure fluid to the tool is out off, and pressure fluid is supplied to the feeding means. to retract the tool, and in another position gaseous` fluid and water are supplied to the work, and pressure fluid 1s supplied to the' tool and the feeding means' to 'cause -the ltool .to be `operated rand 'retracted.

23. A rock drill having a cylinder; a pis- .ton working therein; a chuck; a hollow for feeeding said'gcylinder; and controlling drill-bitgmounted in said chuck and operated by said piston; pressure fluid means means having ports so arranged that in one positiony thereof gaseous fluid is supplied to said drill-bit, the supply of water to the.

drill-bit is 'cut' off, the supply of lpressure i fluid to Avreciprocate said piston is vcut olf, the

5 Q2-hln arock drill having a cylinder.; a

is cut off, and

supplyof pressure fluid to the feeding meanspressure fluid Ais admitted. to saidchuck'.

piston working therein; a chuck; a-hollow drill-bit mounted in said chuck and y'oper-rv ated-by -said piston; pressure fluid means ,for feeding saidfcylinder; and controlling '."meansliaving ports sofarranged that in one position thereof gaseous fluid; is supplied to said-"drill-bit, `the supply of Vwater to 'the drill-bit is cut off; the supply of pressure I' fluidtoreciprocatesaidpiston is cutoff, and *pressure-fluid is supplied'to the-feeding means to-advance the'cylinder, and pressure v 4 fluidsis admitted to said'chuck.

' 'drill-bitmounted in saidv chuckand operated 'by4 piston; pressure fluid. means for .g feeding" said cylinder;

i; "A rock drill having a cylinder; a piston-A wo-rking" therein; a4 chuck; a hollow and,` controlling 1 means having ports so arranged .that in one position thereof gaseous fluid and water are supplied'to the'drill-bit, the supply ofpressurefluid to reciprocate said piston is cut. :offypr'essure fluid is supplied Ito the feeding meanstoadvance the cylinder, and pressure .fluid is admitted to said chuck.

261A rock drillhaving a cylinder a piston working therein; a chuck;- a hollow ,dri'lldoit mounted" ii-i" iaid chuck and operatedgbyfsad piston; Vpressure fluid means forl feeding-said cylinder; and controlling 1meanshavingports,so arranged that in one position thereof gaseous `llui'd and water are. supplied to Athe'drill-bit, pressure fluid is supplied to reciprocate the piston; 'and pressure fluid is supplied to the feeding. means toad'vance the cylinder.v I

27. A rock drill having a c 'fliader; a piston working therein; a chuck; va hollow drill-bit mounted in said chuck and operated by said piston; pressure fluid means for feeding said cylinder; and controlling means having ports so arranged that in one position thereof gaseous fluid and water are means having ports so arranged that in one y positionfthereof gaseousfluid and water are supplied to the drill-bit, and'pressure fluid.

is supplied .to reciprocate the piston, and

toretract the cylinder.

29. Drilling apparatus combination, a drill bit,- a drill cylinder, percussive means, automatic drill lbit rotating means, pressure ,fluid'a'ctuated drill feeding means, fluid actuatedl drill retracting means, and conduit means forv conductcomprising I in v ingy pressure fluid to said drill'bit rotating means'and to saiddrill retraction means;

said drill cylinder, said drill bit andsaid drill ret'racting means being substantially axially alined, whereby said drill retracting means' may exert a direct pull-on saidr .drill bit to. retract said bit from' the workwhile said drillis automatically rotating.

'30. vDrilling apparatus comprising in combination, feed mechanism including two telescopic, pressure fluid actuated, relatively slidable members; a drill cylinder substantally axially alined with, in advanceof,andv` exterior to said feeding mechanism; adrill bit; percussive means; automaticl drill bit rotating means; and conduit means for `con- Vducting pressure fluid to said-feeding mechanism and said drill cylinder; whereby said drill bit may be automatically subjected to percussive action, rotated and fed to L,the i work,l while said drill cylinder is supported betweensaid feed mechanism and said drill bit. f y,

Intestimony. whereof, I have signed my name to this specification, in the presence oftwo subscribing witnesses. I

GEORGE H. Witnesses: LoUis A. .'JoNEs, f CLARA L. STUART.

GILMAN. 

